Inorganic Chemistry: Symmetry

 


3049) In the Td point group, a clockwise S4 operation using the axis shown converts the atom labeled 1 into which position?

1, 2, 3, 4


The S4 operation carried out twice in succession, S42, converts the atom labeled 1 into which position?

1, 2, 3, 4


The S4 operation carried out three times in succession, S43, converts the atom labeled 1 into which position?

1, 2, 3, 4


The S4 operation carried out four times in succession, S44, converts the atom labeled 1 into which position?

1, 2, 3, 4


The operation S42 is equivalent to which operation?

E, C2, sigma d

3050) What is the point group associated with each of the following conformations of ethane, shown below as Newman projections?




Demonstration: Some tetrahedral models can be linked together to examine the ethane confomers (e.g. Darling models)

3051) Demonstration: Pass out plastic tetrahedra, octahedra, and rubber bands, which can be used to represent chelating ligands. A flow chart for assigning point groups can be made available.

For the following tetrahedron- or octahedron-based compounds, where M is a central atom, A and B are distinct monodentate ligands and (A^A) is a chelating bidentate ligand, name the point group to which each of the following species belong:



M(A^A)B2: C2v, D2, D2d
MA2B2: C2v, D2, D2d

M(A^A)B4: C2v, D2, D2d

trans-MA2B4: C4v, D4, D4h

cis-MA2B4: C2v, D2, D2d

M(A^A)3: C3v, D3, D3d

3052) Using the sigma bonds of [MnCl4]2- as a basis set, determine the characters of their corresponding reducible representation:

3053) Demonstration: Some octahedral models can be linked together to examine the structure below.




To what point group does the staggered S2F10 structure, shown in two different views above, belong?

C4v, D4, D4d, D4h

3054) If an octahedron is distorted by stretching along the C3 axis, what is the resulting point group?

C3v, D3, D3d, D3h


If it is stretched instead along the C4 axis, what is the resulting point group?

C4v, D4, D4d, D4h

3055) From the character table below, how many sets of d orbitals are there in Oh symmetry?

1, 2, 3

3056) From the character table below, how many sets of d orbitals are there in D3h symmetry?

1, 2, 3


3059) Are three sequential S3 operations equivalent to the identity operation, E?

yes, no



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